10 Best Bass Distortion Pedals 2025 in the United States

The Darkglass Microtubes B7K Ultra V2 is a versatile bass preamp pedal that combines distortion, EQ, and overdrive in one compact unit. It’s designed for bass players who want a wide range of tone-shaping options. With a 4-band active EQ, you get precise control over bass, low mids, high mids, and treble, allowing you to dial in your perfect sound. The gain range is flexible, and the Grunt switch adds extra low-end boost to make your tone thicker and more powerful.

One standout feature is the balanced XLR output with switchable cabinet simulation, which is great for direct recording or live use without needing extra gear. The pedal also supports loading custom cabinet impulse responses via USB, giving you even more sonic variety. The aux input and headphone output with cab sim make it convenient for practicing quietly with your own music. It uses a 10V power supply and weighs about 1.5 pounds, making it sturdy but still pedalboard-friendly.

The pedal’s analog signal path ensures warm, natural tones, and the blend control helps balance clean and overdriven signals nicely. The Micro-USB connection may feel a bit outdated compared to modern USB-C, and the pedal might have a learning curve for beginners because of its many features. It is somewhat pricey, which might be a consideration for players just starting out. Nonetheless, players looking for a premium, feature-rich bass distortion pedal with excellent tone control and recording options will find the B7K Ultra V2 an excellent choice.

The Aguilar AGRO V2 is a bass distortion pedal designed to deliver a wide range of overdrive tones, from warm and tube-like to aggressive distortion. It excels in tone control with dedicated saturation, contour, and presence knobs, allowing you to shape your midrange and add clarity and attack to your sound. The gain range is versatile, making it suitable for subtle warmth or heavier distortion without losing definition. It uses analog signal processing, which helps maintain a natural and clear bass tone even at high gain.

The pedal features a simple setup with single 1/4" input and output jacks and requires a standard 9-volt power supply (not included). Its lightweight and compact design make it easy to carry and fit on pedalboards, while the build quality is solid and durable for regular use. Needing an external power supply means one more item to carry or buy separately.

If you want a pedal that balances flexibility, clarity, and robust distortion options in a small package, this pedal will serve bass players who want warm to aggressive tones with precise control. It is a good choice for gigging musicians and recording situations where tone versatility and reliability matter.

The Darkglass Microtubes Infinity is a compact and versatile bass distortion pedal that also acts as a preamp, compressor, and audio interface. It offers a rich distortion with multiple tonal shaping options, including six touch-sensitive EQ sliders and a 6-band graphic EQ for precise control over your sound. Its gain range is broad, giving you everything from subtle grit to heavy distortion, suitable for a variety of bass styles. The pedal uses analog signal processing and features a true bypass, which means it won’t affect your tone when switched off. Powering the unit requires a standard 9V DC supply, which is common and easy to find.

The build quality is solid yet lightweight, making it easy to carry and fit on your pedalboard without taking up much space. Additional features like a built-in tuner, compressor with five ratios, and Bluetooth and USB connectivity for recording or practicing add extra value, especially for players who want to streamline their setup.

While the many features and controls might feel overwhelming for those who prefer a simple plug-and-play pedal, and its price and complexity might exceed the needs of casual players, bassists seeking a flexible distortion pedal that doubles as a preamp and recording tool will find the Microtubes Infinity to be a well-rounded option with excellent sound shaping and reliable build.